53178840 has 192 divisors, whose sum is σ = 203243040. Its totient is φ = 11888640.

The previous prime is 53178833. The next prime is 53178869. The reversal of 53178840 is 4887135.

53178840 is a `hidden beast` number, since 531 + 7 + 88 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 53178795 and 53178804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 50964 + ... + 51996.

Almost surely, 2^53178840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53178840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101621520).

53178840 is an abundant number, since it is smaller than the sum of its proper divisors (150064200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53178840 is a wasteful number, since it uses less digits than its factorization.

53178840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074 (or 1067 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 53178840 is about 7292.3823267846. The cubic root of 53178840 is about 376.0506005539.

The spelling of 53178840 in words is "fifty-three million, one hundred seventy-eight thousand, eight hundred forty".